We consider a long-lived principal, who can accumulate capital, and fa
ces a sequence of myopic agents. For instance, a farsighted manager fl
oats the shares of his firm on a myopic stock market, or a social secu
rity institution must propose contracts that are acceptable by the cur
rent active population. In these circumstances, we study the shape of
the investment decision, the dynamics of accumulation, and the long-ru
n steady-state. In particular, we characterize situations where the sh
ort horizons of the agents have a dramatic effect and lead to the clos
ure of the firm or the demise of the social security system.